package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password=DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
//   新增员工
    @Override
    public void save(EmployeeDTO employeeDTO) {
     Employee emp=new Employee();
     BeanUtils.copyProperties(employeeDTO,emp);

//     密码进行 md2加密
     emp.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes(StandardCharsets.UTF_8)));

//     emp.setUpdateTime(LocalDateTime.now());
//     emp.setCreateTime(LocalDateTime.now());
//     emp.setCreateUser(BaseContext.getCurrentId());
//     emp.setUpdateUser(BaseContext.getCurrentId());
     employeeMapper.insertUser(emp);
    }

    /*
     * @Description  分页查询
     * @Param [pageQueryDTO]
     * @return com.sky.result.PageResult
     **/
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO) {
//        开始分页
        PageHelper .startPage(pageQueryDTO.getPage(), pageQueryDTO.getPageSize());

        Page<Employee> page=employeeMapper.pageQuery(pageQueryDTO);

        long total = page.getTotal();

        List<Employee> result = page.getResult();

        return new PageResult(total,result);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);

    }

    @Override
    public Employee getOne(Long id) {
       Employee employee= employeeMapper.selectById(id);
       employee.setPassword("****");
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
       Employee employee=new Employee();
       BeanUtils.copyProperties(employeeDTO,employee);
//       employee.setUpdateTime(LocalDateTime.now());
//       employee.setUpdateUser(BaseContext.getCurrentId());
       employeeMapper.update(employee);
    }

    /*
     * @Description  修改密码
     * @Param [passwordEditDTO, request]
     * @return void
     **/
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO, HttpServletRequest request) {
        Cookie[] cookies = request.getCookies();
        if (cookies==null){
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
//        通过cookie获取用户的name
        String username=null;
        for (Cookie cookie: cookies) {
              if (cookie.getName().equals("username")){
                  username=cookie.getValue();
              }
        }
//        通过name获取用户的旧密码
        Employee employee = employeeMapper.getByUsername(username);
//        匹配旧密码
        if (!DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes(StandardCharsets.UTF_8))
                                        .equals(employee.getPassword())){
//            匹配失败,抛出异常
          throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes(StandardCharsets.UTF_8)));
        employeeMapper.update(employee);
    }
}
